CVE-2024-50161
Estado: ModificadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
bpf: Check the remaining info_cnt before repeating btf fields
When trying to repeat the btf fields for array of nested struct, it doesn't check the remaining info_cnt. The following splat will be reported when the value of ret * nelems is greater than BTF_FIELDS_MAX:
Fix it by checking the remaining info_cnt in btf_repeat_fields() before repeating the btf fields.
Detalles técnicos trazas, registros y código del informe original
------------[ cut here ]------------ UBSAN: array-index-out-of-bounds in ../kernel/bpf/btf.c:3951:49 index 11 is out of range for type 'btf_field_info [11]' CPU: 6 UID: 0 PID: 411 Comm: test_progs ...... 6.11.0-rc4+ #1 Tainted: [O]=OOT_MODULE Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS ... Call Trace: <TASK> dump_stack_lvl+0x57/0x70 dump_stack+0x10/0x20 ubsan_epilogue+0x9/0x40 __ubsan_handle_out_of_bounds+0x6f/0x80 ? kallsyms_lookup_name+0x48/0xb0 btf_parse_fields+0x992/0xce0 map_create+0x591/0x770 __sys_bpf+0x229/0x2410 __x64_sys_bpf+0x1f/0x30 x64_sys_call+0x199/0x9f0 do_syscall_64+0x3b/0xc0 entry_SYSCALL_64_after_hwframe+0x4b/0x53 RIP: 0033:0x7fea56f2cc5d ...... </TASK> ---[ end trace ]---
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 5.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.20%
- Percentil entre todas las CVEs puntuadas: 9
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
CWE
- CWE-129
- CWE-129
Referencias
JSON original (NVD)
Mostrar
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Check the remaining info_cnt before repeating btf fields\n\nWhen trying to repeat the btf fields for array of nested struct, it\ndoesn't check the remaining info_cnt. The following splat will be\nreported when the value of ret * nelems is greater than BTF_FIELDS_MAX:\n\n ------------[ cut here ]------------\n UBSAN: array-index-out-of-bounds in ../kernel/bpf/btf.c:3951:49\n index 11 is out of range for type 'btf_field_info [11]'\n CPU: 6 UID: 0 PID: 411 Comm: test_progs ...... 6.11.0-rc4+ #1\n Tainted: [O]=OOT_MODULE\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS ...\n Call Trace:\n <TASK>\n dump_stack_lvl+0x57/0x70\n dump_stack+0x10/0x20\n ubsan_epilogue+0x9/0x40\n __ubsan_handle_out_of_bounds+0x6f/0x80\n ? kallsyms_lookup_name+0x48/0xb0\n btf_parse_fields+0x992/0xce0\n map_create+0x591/0x770\n __sys_bpf+0x229/0x2410\n __x64_sys_bpf+0x1f/0x30\n x64_sys_call+0x199/0x9f0\n do_syscall_64+0x3b/0xc0\n entry_SYSCALL_64_after_hwframe+0x4b/0x53\n RIP: 0033:0x7fea56f2cc5d\n ......\n </TASK>\n ---[ end trace ]---\n\nFix it by checking the remaining info_cnt in btf_repeat_fields() before\nrepeating the btf fields."
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"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: bpf: Verificar el info_cnt restante antes de repetir los campos btf Al intentar repetir los campos btf para una matriz de estructuras anidadas, no verifica el info_cnt restante. Se informará el siguiente error cuando el valor de ret * nelems sea mayor que BTF_FIELDS_MAX: ------------[ cortar aquí ]------------ UBSAN: array-index-out-of-bounds en ../kernel/bpf/btf.c:3951:49 el índice 11 está fuera de rango para el tipo 'btf_field_info [11]' CPU: 6 UID: 0 PID: 411 Comm: test_progs ...... 6.11.0-rc4+ #1 Tainted: [O]=OOT_MODULE Nombre del hardware: QEMU Standard PC (i440FX + PIIX, 1996), BIOS ... Seguimiento de llamadas: dump_stack_lvl+0x57/0x70 dump_stack+0x10/0x20 ubsan_epilogue+0x9/0x40 __ubsan_handle_fuera_de_límites+0x6f/0x80 ? kallsyms_lookup_name+0x48/0xb0 btf_parse_fields+0x992/0xce0 map_create+0x591/0x770 __sys_bpf+0x229/0x2410 __x64_sys_bpf+0x1f/0x30 x64_sys_call+0x199/0x9f0 do_syscall_64+0x3b/0xc0 entry_SYSCALL_64_after_hwframe+0x4b/0x53 RIP: 0033:0x7fea56f2cc5d ...... ---[ fin del seguimiento ]--- Arréglelo comprobando el info_cnt restante en btf_repeat_fields() antes de repetir los campos btf."
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